Duplicate / Copy records in the same MySQL table

user_76793 0
Viewed 136377

I have been looking for a while now but I can not find an easy solution for my problem. I would like to duplicate a record in a table, but of course, the unique primary key needs to be updated.

I have this query:

INSERT INTO invoices
    SELECT * FROM invoices AS iv WHERE iv.ID=XXXXX
    ON DUPLICATE KEY UPDATE ID = (SELECT MAX(ID)+1 FROM invoices)

the problem is that this just changes the ID of the row instead of copying the row. Does anybody know how to fix this ?

//edit: I would like to do this without typing all the field names because the field names can change over time.

mysql
10 Answers

You KNOW for sure, that the DUPLICATE KEY will trigger, thus you can select the MAX(ID)+1 beforehand:

INSERT INTO invoices SELECT MAX(ID)+1, ... other fields ... FROM invoices AS iv WHERE iv.ID=XXXXX
user_866040

I have a similar issue, and this is what I'm doing:

insert into Preguntas  (`EncuestaID`, `Tipo` , `Seccion` , `RespuestaID` , `Texto` )  select '23', `Tipo`, `Seccion`, `RespuestaID`, `Texto` from Preguntas where `EncuestaID`= 18

Been Preguntas:

CREATE TABLE IF NOT EXISTS `Preguntas` (
  `ID` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `EncuestaID` int(11) DEFAULT NULL,
  `Tipo` char(5) COLLATE utf8_unicode_ci DEFAULT NULL,
  `Seccion` int(11) DEFAULT NULL,
  `RespuestaID` bigint(11) DEFAULT NULL,
  `Texto` text COLLATE utf8_unicode_ci ,
  PRIMARY KEY (`ID`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=522 ;

So, the ID is automatically incremented and also I'm using a fixed value ('23') for EncuestaID.

user_1216760

You can alter the temporarily table to change the ID field to a bigint or so without the NOT NULL requirement, then set the ID to 0 in that temp table. After that add it back to the original table and the NULL will trigger the auto increment.

CREATE TEMPORARY TABLE tmptable SELECT * FROM x WHERE (id='123');
ALTER TABLE tmptable CHANGE id id bigint;
UPDATE tmptable SET id = NULL;
INSERT INTO x SELECT * FROM tmptable;
user_115500070
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